Several important fact
Date：Apr-25-2024
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Presumably, China, Eastern Europe countries and Russia will gradually become a major OSB producers, and new impact on the entire market dynamic.
Currently on the market, plywood consumption annual growth rate of 5% and 11% of OSB, plywood corresponding shortage of supply, OSB relative surplus in the coming period, the OSB will gradually become a substitute for plywood.
Is expected to 2015, 54% of the world plywood production from northern Asia, a slight decrease compared to 56 percent in 2010. 77% of the global OSB production from North America, in order to ensure the quality of plywood production.
Plywood production in almost every process in varying degrees, affect the quality of plywood glue, easy to master, several aspects are summarized as follows:
1, the adhesive quality
Performance with the performance of the synthetic resin adhesive for glue, several aspects of the groups with the gel process. In recent years on the plywood, plastic components and the process of the gel a lot of research work, which not only saves a lot of chemical raw materials, reduce product cost, product performance has also improved, which is the performance of technological progress. Only used in the production of synthetic resin with excellent performance, there is sufficient bonding strength adhesive group is assigned more than reasonable and the stability of the modulation of adhesive properties, resin content and viscosity suitable for long enough period of activity in order to ensure normal operation and products indicators to meet the requirements.
2, veneer quality
Veneer quality, especially in the surface state a great influence on the bonding strength. Quality of the veneer in the wood segment preparation and veneer peeling process should be enough attention to good wood to soften, to control the peeling conditions so that the veneer of the indicators is the best value, should pay attention to the veneer moisture content rate and flatness.
3, plywood glued
Plastic pressure should be careful to take good glue content and slab two aspects of the aging. Plastic excessive, the cost amount is high; and adhesive layer is too thick, the internal stress increases, while easily through the plastic; the glue is too small, not conducive to the infiltration of glue, the rubber will be incomplete. The length of aging time should be appropriate, reasonable change with climate change. To achieve the Core to the whole, to reduce the core plate stack, away from the seam. Pay attention to master the plastic layering Chung, step-down speed, especially the slab more water should pay attention to.
In addition to adopting new technologies, new equipment, such as the use of efficient jet veneer dryer, Core patchwork machine, Core levelers, sizing, group blank, pre-pressure, hot continuous operation, the use of mechanized loading and unloading. rapid closure of the pressing machine, etc., can accurately control the process conditions, product quality is more assured.